信息网络安全 ›› 2015, Vol. 15 ›› Issue (6): 26-32.doi: 10.3969/j.issn.1671-1122.2015.06.005

• 技术研究 • 上一篇    下一篇

一种电路域加密通信方案

李远(), 周卫华, 单旭   

  1. 中国科学院信息工程研究所,北京 100093
  • 收稿日期:2015-03-09 出版日期:2015-06-20 发布日期:2018-07-16
  • 作者简介:

    作者简介: 李远(1990-),女,安徽,硕士研究生,主要研究方向:信息安全;周卫华(1976-),男,山东,高级工程师,博士,主要研究方向:专用移动通信;单旭(1989-),男,山东,助理工程师,硕士,主要研究方向:加密通信。

  • 基金资助:
    国家863科技计划[2015AA01A706];中科院“百人计划”[Y3Y0011104]

An Encryption Communication Scheme Based on Hardware in Circuit-Switched Domain

LI Yuan(), ZHOU Wei-hua, SHAN Xu   

  1. Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China
  • Received:2015-03-09 Online:2015-06-20 Published:2018-07-16

摘要:

从20世纪20年代现代移动通信技术诞生起,移动通信技术的迅速发展和广泛应用给人们的生活带来了极大的便利,移动通信网络的应用已深入到社会的方方面面。但是,这也带来许多安全隐患。由于空口传输的开放性使得其易被窃听等原因,移动通信安全已经成为人们关注的热点问题。为了加强现代移动通信系统的安全性,文章提出了一种电路域的加密通信方案,包括适用于电路域加密的轻量级证书,基于安全TF卡的语音加解密系统,在智能手机上实现的模块设计、状态机设计等。方案综合考虑了安全性和可用性,在电路域这种带宽较小且误码率较高的环境下,以尽可能小的代价完成身份认证和密钥协商,并最终实现加密通信。实验证明,此方案在Android平台实现后,使得需要加密通信的用户能够互相添加对方至加密通讯录,并进行加密短信和加密通话。其中加密通话能在通话开始时以合理的时延为代价,完成身份认证和密钥协商。性能测试表明,加密对通话的时延和失真影响在可以接收的范围内。

关键词: 加密, 电路域, 安全语音, Android

Abstract:

From the birth of modern mobile communication technology, rapid development and wide application of mobile technology brought great convenience to people's lives, and the widely applicable mobile network technology had influenced all aspects of the society. However, it also brought a lot of security problems. Because of reasons such as open-air transmission which made it vulnerable to eavesdropping, the mobile communication security had become a hot issue. In order to guarantee the confidentiality of mobile system, this paper proposed an encryption scheme based on TF Card in CS domain, including a lightweight certificate based on SM2, system module design and state machine design. This scheme took both availability and security into account. It helped complete identity authentication at the cost as low as possible. Experiment on Android shows that this method can protect users’ information security on mobile phone with little performance cost.

Key words: encrypt, CS domain, secure voice, Android

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